Means for making printing plates



Aug. 12. 1924. 1,504,872

F. DE .MINICO MEANS FOR MAKING FRTNTING PLATES r1; Filed Nov. 1D 1922 *fials Aitornqzy.

Patented Aug. 12,

UNITED STATES PATENT OFFICE.

FRANK DE MINICO, OF NEW YORK, N. Y., ASSIGNOR TO POLLARD-ALLING MANUFAC- TUBING- COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

MEANS FOR MAKING PRINTING PLATES.

Application filed November 10, 1922. Serial No. 600,065.

7 '0 all whom it may concern:

Be it known that I, FRANK DE MINICO, a citizen of the United States, and a resident of New York, borough of Bronx, in the county of Bronx and State of New York,

have invented certain new and useful Improvements in Means for Making Printing Plates, of which the following is a specification.

This invention relates to means for making printing plates, and has for its object to provide a series of sequentially acting tools of simple construction and a simple mode of operation therefor.

To these ends my improvements comprise features illustrated in their preferred embodiment in the drawings accompanying this specification, wherein:

Figure 1 is an end elevation, partly in section, of a punch and die for carrying out the first step in the operation of my improvements and includes, below said die, an end view of the punched and bent blank produced by said punch and die. Fig. 2 is an end elevation of a punch and die for carrying out the second step in said operation and lying on said die, in end view, is shown the blank of Fig. 1 advanced one step further in said operation. Fig. 3 is an end elevation of a punch and die for carrying out the third step and which may be the final step in said operation, and on said die, in end view, is shown the blank of Fig. 1 ad: vanced said third step in the operation. Fig. 1 is a plan view of the blank shown in Fig. 1. All the figures of the drawing are to one scale.

The punches of this series of punches and dies are constructed for operation, in paral+ lelism toward their respective dies and may be conveniently carried by the same reciprocating head of a punch press, not shown, and their coacting dies may be mounted on the bed plate of said punch press. Said punches are herein represented as adapted for vertical movement toward and from their respective dies. In Fig. 1 punch 2 and die 3 have coating profiles corresponding with the pro file of the blank of Fig. 4:. The lower face of punch 2 is flat or approximately so, in substantial parallelism with the face of die 3, except for a portion adjacent its right hand edge, where at 4:, that edge is beveled ofi upwardly, whereby in the operation of punching a blank 5 from a sheet of material, an.

upturned flange 6 is formed along one edge thereof. This upturned flange provides an initial bend in said blank whereby edge 6 may be rolled over with facility and precision in a later step. In Fig. 2 punch 7 and die 8 have end profiles, respectively, adapted for forming a second bend 9 in said blank, adjacent and parallel with said first bend and in the same direction. In Fig. 3 punch 10 and die 11 have end profiles, respectively, for rolling over the doubly bent edge of the blank toward the body 5 of the plate whereby there is formed an approximately cylindrical tubular rib along the right hand edge of the plate. To this end die 11 has an upstanding abutment 12 adapted for supporting the previously bent up edge of the blank and punch 10 has a nearly semi-circular groove 13 lengthwise its lower face, said groove having an angularly disposed wall 14 leading downwardly to the right therefrom. As said punch descends into coaction with die 11, the inturned edge 6 of the blank will enga e said wall 14 and be further turned inwardly to the left, and as said edge 6 encounters groove 13 of said punch, it will be rolled over into approximately cylindrical tubular form.

I claim:

Means for producing a printing plate having an approximately cylindrical tubular rib on one edge thereof, comprisinga series of three pairs of coacting punches and dies respectively, said punchesbeing oper ated in parallelism towardtheirrespective dies, said first punch and die being adapted for punching out the plate blank from sheet material, the punch whereof is beveled on one edge whereby an upturned flange is formed on an edge of the blank simultaneously with said punching out of the blank, said second punch and die being adapted for forming a bend parallel with and adjacent said upturned flange, and said third punch and die being adapted for rolling over said doubly bent edge toward the body of the plate.

In witness whereof, I hereby afiix my signature this 8th day of November, 1922.

FRANK DE MINICO. 

